1-3 Mixing colours (1.1)

• Natuurkunde
• Middelbare school
• havo
• Leerjaar 2

Mixing colours (p. 16)

Bluetooth 

- On

Stationary

- Books

- Pen and pencil

- iPad

Report

- NO

Lessonup

- Yes

Bags in

the cuboard

Phones in the phone holder

Lesson goals:

• What happens when we mix colours of light?
• What happens when we mix colours of paint?

Activity 2 (p. 19)

Mixing paint

1. Groups of two
2. Take a piece of paper
3. Place on it about 10 drops of each colour of paint.
4. Mix the colours together and write what the result is.
5. Write an explanation for the difference you observed when you mixed colours of paint and when you mixed colours of light. 

Why do you think there is a difference when you mix licht as compared to when you mix paint?

Mixing colours of paint

• When mixing the primary colours of paint, you get dark colours.

• When it comes to paint,  you must not so 

       much look at which colours are reflected. 
       It is more about which colours are absorbed.

• With yellow, magenta and cyan paint, we can make diffrent colours.

Which colours does a printer have?

When you look at a blue jersey through a red filter, it will appear black.

An inkjet printer usually only has four colours of ink: magenta, cyan, yellow and black

1. True
2. False

The yellow ink of a printer absorbes only one colour.

1. True
2. False

Cyan ink absorbes red light.

1. True
2. False

Which colour will you see if you project yellow light on a blue screen?

1. Yellow
2. Blue
3. White
4. Black

Which colour will you see if you project magenta on a red screen?

1. Magenta
2. Red
3. Black
4. White

Which colour will you see if red, green and blue are projected on a white screen?

1. Black
2. White
3. Grey
4. Yellow

phet.colorado.edu

Do the following questions:

16 to 18 (p. 17)

In your writingbook

Rules: 

- 6 minutes

- No talking

Finished early: play with the simulation

In a nutshell:

• When mixing colours of light,  focus on which colours are reflected, and when mixing colours of paint,  focus on which colours are absorbed.